// 初始化画布
let canvas = document.querySelector('#canvas');
let context = canvas.getContext('2d');

// 设置画布宽高
canvas.width = document.documentElement.clientWidth;
canvas.height = document.documentElement.clientHeight;

// 设置画布背景色
// let backGroundColor = 'rgb(36, 74, 101)';
// context.fillStyle = backGroundColor;
// context.fillRect(0, 0, canvas.width, canvas.height);
